Mercedes 300D ABS fault

[Wellbrook]

I have a problem with the ABS warning light not going out on engine startup. It does go out sometimes after engine run awhile. Whilst the ABS warning light is on the tachometer does not work. When light goes out Tacho works OK. When light is on engine runs a little uneven, when off engine runs smoothly. Does anyone know what the likely problem to be and is there a cheap solution? Thanks
Alan B

 

[television]

This should be a faulty OVP , its the one with the fuse on top

 

[wireman]

I'll go with malcolm again on this one, the OVP provides 12v power to ABS and tickover control.

Dig around the forum for some previous posts about this problem, the relay in some cases can be repaired and you will find my description of whats often wrong and how I have repaired them.

The OVP is under the black plastic flap behind the battery in fromt of the ABS controller and beneath another black cover that is intended to keep the elements out.
The cover and relay simply clip in place.

 

[Wellbrook]

ABS light

Thanks for info. Have checked fuse and wiring seams OK. Will try and get a replacement. Keep you informed
Wellbrook

 

[teddycatkin]

As with others --it looks like fauty OVP --mine was "£60 inc vat Sir " from my stealer.

 

[xitrum_dalat]

this ovp always has a small crack

between the plug leg and circuit

i cannot remember which plug number.

but if you try to find you will see.

then , just weld it.

 

[Wellbrook]

Wellbrook
New OVP relay purchased from Partsforemercedes-benz.com. Not too expensive,excellent service and when fitted (5 mins) problem resolved. Thanks for good advice, saved a fortune.